Rename config.h(.in) to dwconfig.h and install it with dwcompat. Building modules that use dwcompat requires some of the defines in dwconfig.h. On some platforms without it the opendir headers are not included and cause build failures. Unix (Linux, BSD, Solaris and Mac) are primarily affected.

# Set these here to change the version for all platforms
DW_MAJOR_VERSION=3
DW_MINOR_VERSION=1